Gray modeling and tendency studying of Track and Field achievements of Olympics based on grey prediction theory

According to at the top three Olympic track and field sports performance, a GM (1,1) gray prediction model group is established combining with gray modeling methods, whose residual model test results shows that the forecasting model group has a high-precision. Additionally, this paper deeply analyzes the top three achievements´ trend of the 26th to the 29th Olympic Games Track and Field. Finally, the 30th London Olympic track and field results are predicted to serve the departments related to the preparing work for the next Olympic Games and to provide the theoretical basis and reference for decision-making.